<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 100vw;
            height: 100vh;
            display: flex;
            justify-content: center;
           justify-content: space-around;
           justify-content: space-between;
        }
        .b1{
            width: 50px;
            height: 50px;
            background-color: palevioletred;
         
       
        }
        .b2{
            width: 50px;
            height: 50px;
            background-color: palegoldenrod;
            
    
         
        }
        .b3{
            width: 50px;
            height: 50px;
            background-color: paleturquoise;
          
        
        }
    </style>
</head>
<!-- <body>
    基础布局练习：
创建一个包含三个子元素的容器，并使用display: flex;将其设置为Flex容器。 -->
<!-- 确保这三个子元素在容器中水平排列。 -->
 <div class="box">
    <div class="b1"></div>
    <div class="b2"></div>
    <div class="b3"></div>
 </div>
</body>
</html>